Hello,
I'm trying to help a friend out with his LS swapped 2006 Trailblazer SS. I spent some time going about tuning the VE table correctly using an AEM wide band UEGO gauge. Getting this done was pretty elementary and the truck runs great in open loop mode. I have errored out the MAF and addressed the fault codes so it functions as a speed density system now.
When I reenable closed loop it begins to build a large positive trim on one bank and a large negative trim on the other bank. Which bank goes positive and which goes negative will change based on coolant temperature it seems.
Under Engine - Fuel - Oxygen Sensors - Feedback - Airflow - Mode VS. Airflow there is a table that I cannot clearly understand. I'm not exactly sure what it does and I'm not exactly certain what parameters to log for this or how to properly tune this table. I believe that this table helps scale the narrow band oxygen sensors to match the wide band sensor that was used to tune the VE table but couldn't say for sure. If anyone has information on this that they could share I'd really appreciate it.
Thanks in advance.